Boysen State Park is a public recreation area surrounding the Boysen Reservoir, an impoundment of the north-flowing Wind River, in Fremont County, Wyoming. The state park covers more than at the south end of the Owl Creek Mountains at the mouth of the Wind River Canyon. History The park was established in 1956 following completion of the Boysen Dam in 1951. It is named for Asmus Boysen, who built the site's first dam in 1908. Part of the original dam can still be seen. Climate According to the Köppen Climate Classification system, Boysen Dam has a cold semi-arid climate, abbreviated "BSk" on climate maps. The hottest temperature recorded at Boysen Dam was on July 4, 1954, while the coldest temperature recorded was on January 31, 1979. Activities and amenities The park offers multiple campgrounds, boat launches, and a privately operated marina. Game fish found in the reservoir include walleye, sauger, perch, crappie, ling, rainbow, cutthroat, and brown trout. References External links Boysen State Park Wyoming State Parks, Historic Sites & Trails Boysen State Park Map Wyoming Division of State Parks and Historic Sites State parks of Wyoming Protected areas of Fremont County, Wyoming Protected areas established in 1956 1956 establishments in Wyoming